Desde el principio is the first part of the series Usos del espanol . This book is organized into 14 units, and each of them is divided into three sections: La Pizarra - its main objective is providing a synthetic analysis of the main points covered in the unit; Ejercicios - this section provides exercises to practise what has been learnt; and, Que me cuentas - vocabulary section containing new words and constructions. This book also includes at the back the answer key to the exercises and a verb conjugation section.
